Paul Christoph Hennings

Paul Christoph Hennings was a German mycologist and herbarium curator. He discovered the study of cryptogams and mushrooms as a volunteer at the botanical garden. Although circumstances initially prevented him to study in that area, he later returned to natural sciences and eventually rose to a position at the largest herbarium in Germany. Originally interested in all nonhigher plants, he specialised into mushrooms and became particularly versed in tropical species sent from abroad.

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Source: Wikipedia